What are the application scenarios for a FIDO security key?

It is used for two-factor authentication.

For example, to log in to the internal system of some firms with high security standard requirements, the FIDO technology is used for two-factor authentication. In this case, a FIDO security key is used as the second factor for two-factor authentication in addition to a password. In this case, a HUAWEI FIDO security key can be used to perform authentication.